Term ends Dec 31, 2027 · High confidence
20-year base term ended Oct 8, 2023
Held by Littelfuse, Inc.
Filed Oct 8, 2003 as application 10/682,384 · Granted Apr 21, 2015
Base term plus 1545 days of patent term adjustment (USPTO delay)
Today
2003
2027
Clock starts
Oct 8, 2003
Oct 8, 2003
Term ends
Dec 31, 2027
Dec 31, 2027
Granted
Apr 21, 2015
Apr 21, 2015
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
1,545
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
10
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 1545 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Oct 8, 2003, when this application, 10/682,384, was filed | Oct 8, 2023 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1545 days, USPTO patent term adjustment record | Dec 31, 2027 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Dec 31, 2027 | High confidence |
This family
| US 6,771,056 | Term ended Oct 2022 | Oct 2022 |
| US 6,670,216 | Term ended Oct 2022 | Oct 2022 |
| US 6,759,692 | Term ended Mar 2023 | Mar 2023 |
| US 6,638,808 | Term ended Jan 2023 | Jan 2023 |
| US 7,071,537 | Term ended May 2023 | May 2023 |
| US 7,005,734 | Term ended Jun 2023 | Jun 2023 |
| US 8,093,652 | Term ended Aug 2023 | Aug 2023 |
| US 7,063,975 | Term ended Oct 2023 | Oct 2023 |
8 of 10 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Mar 22, 2004 Reel 15119, frame 130 | Zommer, Nathan | Ixys Corporation | Assignment of Assignor's Interest |
| Mar 31, 2018 Reel 45406, frame 600 | Ixys Corporation; Ixys, LLC | Ixys, LLC | Merger and Change of Name |
| May 1, 2019 Reel 49056, frame 649 | Ixys, LLC | Littelfuse, Inc. | Assignment of Assignor's Interest |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Dec 2027
Term ends Dec 31, 2027. No further fees fall due before then
Note
The 1545 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
4
later US patents cite this one
That is below the median of utility patents granted in 2015 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.